Paypal payment module not working on fragment about braintree_android HOT 11 CLOSED

public class PaymentActivity extends AppCompatActivity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_check_out);
        Init();
    }

    private void Init() {

	FrameLayout frameLayout = findViewById(R.id.frame);
          
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            PaymentFragment checkoutLoginFragment = new PaymentFragment();
            fragmentTransaction.replace(R.id.frame, checkoutLoginFragment);
            fragmentTransaction.commit();
       
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        for (Fragment fragment : getSupportFragmentManager().getFragments()) {
            fragment.onActivityResult(requestCode, resultCode, data);
        }
    }
}
----------------------------------------------------------------------------------------------------------------

public class PaymentFragment extends Fragment implements PaymentMethodNonceListener {

    private Braintree mBraintree;
    private Button mPaymentButton;
    String mClientToken ;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_paypal, container, false);
        mPaymentButton = (Button) view.findViewById(R.id.btn_donate);
                  try {
                        if(getActivity()!=null){
                            mBraintreeFragment = BraintreeFragment.newInstance(getActivity(),mClientToken);
                        }
                    } catch (InvalidArgumentException e) {
                        e.printStackTrace(); 
                    }

        mPaymentButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PayPalExpressCheckout();
            }
        });
        return view;
    }

public void PayPalExpressCheckout(){
        PostalAddress address=new PostalAddress()
				.streetAddress(“13th street”)
				.locality(“SanMarkam”) 
				.region(“kelongudi”)
				.recipientName(“John Mark”)
				.countryCodeAlpha2(Arabia);
        PayPalRequest request = new PayPalRequest("1")
                			.currencyCode("USD")
                			.shippingAddressRequired(true)
                			.shippingAddressOverride(address)
                			.intent(PayPalRequest.INTENT_AUTHORIZE);
        PayPal.requestOneTimePayment(mBraintreeFragment, request);
    }
}

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    }


@Override
   public void onPaymentMethodNonceCreated(PaymentMethodNonce paymentMethodNonce) {
        String nonce = paymentMethodNonce.getNonce();

        if (paymentMethodNonce instanceof PayPalAccountNonce) {
            PayPalAccountNonce payPalAccountNonce = (PayPalAccountNonce)paymentMethodNonce;

            // Access additional information
            String email = payPalAccountNonce.getEmail();
            String firstName = payPalAccountNonce.getFirstName();
            String lastName = payPalAccountNonce.getLastName();
            String phone = payPalAccountNonce.getPhone();

            // See PostalAddress.java for details
            PostalAddress billingAddress = payPalAccountNonce.getBillingAddress();
            PostalAddress shippingAddress = payPalAccountNonce.getShippingAddress();
        }
    }

}

mBraintreeFragment = BraintreeFragment.newInstance(getActivity(), clientToken);